Control chart and process control

An aerospace company machines parts to be used in satellites. A critical dimension for one of these parts is its thickness: the target value is 1.04 millimeters with lower and upper specifications of 1.00 and 1.08 millimeters, respectively. Given the following data, complete an appropriate control chart and determine if the process appears to be in control.

Date 1/5 1/5 1/5 1/6 1/6 1/6 1/7 1/7 1/7
Time 1000 1400 1800 1000 1400 1800 1000 1400 1800

Obs 1.04 1.05 1.04 1.07 1.04 1.04 1.06 1.07 1.04
1.06 1.05 1.06 1.03 1.05 1.05 1.04 1.06 1.03
1.04 1.06 1.05 1.02 1.01 1.03 1.04 1.06 1.02
1.03 1.07 1.06 1.05 1.03 1.03 1.05 1.05 1.03

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